Information Technology Reference
In-Depth Information
Note: The measure of uptime should not be limited to the time a particular
server is in operation, but should also include periods of network instability,
service unavailability, and any other times during which the target service
is not reliable from the perspective of its consumers. To measure service
uptime accurately, it is not enough to count the number of seconds between
system reboots, because overload and instability can remove a running
server from a functional state just as easily as turning off the power.
The Federated Enterprise
Enterprise planning and execution will take time to implement correctly
and with a minimum of disruption to users and business units. Because
the process can be somewhat protracted, it is important to identify useful
tools to provide integration and federation of resources during the mid-
migration period. Two common types of federated technology solutions
involve identity management and data.
1. Federated identity management. These solutions sit above the
various authentication pools and provide translation or synchro-
nization between security principals. Sometimes referred to as a
meta-directory, a federated identity management solution can
improve transparency between legacy solutions and a modernized
or consolidated architecture. As legislative mandates for account-
ability and privacy increase in number, such meta-directories ful-
fill compliance reporting and control functions beyond simple
authentica tion translation.
2. Federated data. The concept of federated data management
evolved to meet the growing need to track information as it passes
through an organization's various applications and data stores.
Such meta-data may be aggregated information or it may be “data
about the data,” and it is often used in data warehouse and busi-
ness intelligence applications. The service-oriented architectural
approach to application design also makes use of data federation
in order to decouple storage of data from transfer and processing
between disparate modules. Standards such as XML and UDDI
expand information to natively include meta-data that may be use-
ful in data federation.
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